Subtract 28/30 from 42/64
42/64 - 28/30 is -133/480.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 64 and 30 is 960
Next, find the equivalent fraction of both fractional numbers with denominator 960 - For the 1st fraction, since 64 × 15 = 960,
42/64 = 42 × 15/64 × 15 = 630/960 - Likewise, for the 2nd fraction, since 30 × 32 = 960,
28/30 = 28 × 32/30 × 32 = 896/960 - Subtract the two like fractions:
630/960 - 896/960 = 630 - 896/960 = -266/960 - After reducing the fraction, the answer is -133/480
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